题目
算一算。
62-7 = 57-3= 12-7= 5+33= 17-8=
53-8= 11-8= 55+4= 14-7= 76-2=
16-9= 49+3= 25+20= 12-8= 17+50=
92-40= 88-60= 7+50= 90+3= 4+27=
48+8= 77-9= 86-20= 5+60= 50-3=
答案:62-7=55 57-3=54 12-7=5 5+33=38 17-8=9 53-8=45 11-8=3 55+4=59 14-7=7 76-2=74 16-9=7 49+3=52 25+20=45 12-8=4 17+50=67 92-40=52 88-60=28 7+50=57 90+3=93 4+27=31 48+8=56 77-9=68 86-20=66 5+60=65 50-3=47